Brown leaves

This is a discussion on Brown leaves within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; -->
I change water weekly...plus check ph values etc which are all around normal but i can still see some &quot;brownish&quot;colors on my plants..is this ...

I change water weekly...plus check ph values etc which are all around normal but i can still see some "brownish"colors on my plants..is this lack of CO2..?? Thanks any advice and how to get that really 'green'plant color..??